to determine the potential habitat of two rangeland species of salsola rigidaand agropyron trichophorum in qasr-e-shirin, iran, geographic information systems(gis) and remote sensing (rs) techniques were used. at first, several maps (vegetationcover and land uses maps and thematic maps of various organizations) were collected orprepared. for digitizing geology, vegetation and conventional state...

We have previously discussed the basic concepts and fundamental theorems on unique factorization in PIDs. We will provide a few examples of how unique factorization is used in applications to number theory. One cannot stress how important the concept of unique factorization is in many mathematical applications and definately in algebraic number theory. We unfortunately will only have the time t...

Recent decades have seen a large increase in surface scums (blooms) of cyanophytes (blue-green algae and blue-green bacteria) in inland waters. These are potentially toxic to mammals, including humans, and have caused considerable public concern in Europe, Australasia, and North America. They are often associated with eutrophication, and much has been invested in their control. Not all blooms, ...

Proposition 1.1. Let f : R1 → R2 be a homomorphism of rings. If J is an ideal of R2, then f (J) is an ideal of R1 containing ker(f) and furthermore f(f(J)) ⊆ J . Now let f : R1 → R2 be an epimorphism of rings. If J is an ideal of R2 then f(f (J)) = J . If I is an ideal of R1 then f(I) is an ideal of R2. Furthermore we have I ⊆ f (f(I)) = I + ker(f) and thus I = f(f(I)) if I contains ker(f). Thu...

background: domestic wastewater is a most important source of infectious factors in the environment. the aim of this study was to determine the raw wastewater parasitic contamination of cites of kermanshah province. methods: this study was a descriptive cross–sectional one which was carried out in 5 months, sampling was accomplished once a five days from inlet raw wastewater to treatment plants...

Khosrow and Shirin is the second of five long narrative poems by Nezami and is one of the finest love stories in Persian literature. This story has been examined so far from different aspects and with different approaches. One of the approaches overlooked in the analysis of this story is the process of individuation from Carl Jung's point of view. Therefore the aim of the present paper is to ps...

pomegranate is an important iranian-native fruit, with many varieties cultivated. although the volume of data on the importance of pomegranates in human nutrition has increased tremendously in the last years, the physical properties of the pomegranate fruit during fruit maturity have not yet been studied in detail. thus, the present study aimed to evaluate changes in physical characteristics of...